Right Inbox bundles nine small features (tracking, scheduling, templates, reminders, recurring sends, notes, signatures, sequences) into one $7.95-$14.95 Gmail extension. The trade-off is that none of the nine is deep, and the entire product is Gmail-only with no Outlook roadmap. Teams typically search for alternatives when the breadth-over-depth trade stops paying off — usually when tracking accuracy becomes load-bearing or when the team hires an Outlook user.
These are the five Right Inbox alternatives worth evaluating, organised by which Right Inbox feature you are actually leaving for: tracking depth, Outlook support, sequence engine, or simpler/cheaper option.